Updated CraftInventory to make use of the proper generics in the Inventory interface.

Updated loads of return values to now return actual Craft* objects.
Added a shitton of constructors to CraftItemStack so you can now finally properly make your ItemStacks.

src/main/java/org/bukkit/craftbukkit/inventory/CraftInventory.java

@@ -84,12 +84,12 @@ public class CraftInventory implements org.bukkit.inventory.Inventory {
         return false;
     }
 
-    public HashMap<Integer, ItemStack> all(int materialId) {
+    public HashMap<Integer, CraftItemStack> all(int materialId) {
-        HashMap<Integer, ItemStack> slots = new HashMap<Integer, ItemStack>();
+        HashMap<Integer, CraftItemStack> slots = new HashMap<Integer, CraftItemStack>();
 
-        ItemStack[] inventory = getContents();
+        CraftItemStack[] inventory = getContents();
         for (int i = 0; i < inventory.length; i++) {
-            ItemStack item = inventory[i];
+            CraftItemStack item = inventory[i];
             if (item.getTypeId() == materialId) {
                 slots.put( i, item );
             }
@@ -97,24 +97,24 @@ public class CraftInventory implements org.bukkit.inventory.Inventory {
         return slots;
     }
 
-    public HashMap<Integer, ItemStack> all(Material material) {
+    public HashMap<Integer, CraftItemStack> all(Material material) {
         return all(material.getId());
     }
 
-    public HashMap<Integer, ItemStack> all(ItemStack item) {
+    public HashMap<Integer, CraftItemStack> all(ItemStack item) {
-        HashMap<Integer, ItemStack> slots = new HashMap<Integer, ItemStack>();
+        HashMap<Integer, CraftItemStack> slots = new HashMap<Integer, CraftItemStack>();
 
-        ItemStack[] inventory = getContents();
+        CraftItemStack[] inventory = getContents();
         for (int i = 0; i < inventory.length; i++) {
             if (item.equals(inventory[i])) {
-                slots.put( i, item );
+                slots.put( i, inventory[i] );
             }
         }
         return slots;
     }
 
     public int first(int materialId) {
-        ItemStack[] inventory = getContents();
+        CraftItemStack[] inventory = getContents();
         for (int i = 0; i < inventory.length; i++) {
             if (inventory[i].getTypeId() == materialId) {
                 return i;
@@ -128,7 +128,7 @@ public class CraftInventory implements org.bukkit.inventory.Inventory {
     }
 
     public int first(ItemStack item) {
-        ItemStack[] inventory = getContents();
+        CraftItemStack[] inventory = getContents();
         for (int i = 0; i < inventory.length; i++) {
             if (item.equals(inventory[i])) {
                 return i;
@@ -142,9 +142,9 @@ public class CraftInventory implements org.bukkit.inventory.Inventory {
     }
 
     public int firstPartial(int materialId) {
-        ItemStack[] inventory = getContents();
+        CraftItemStack[] inventory = getContents();
         for (int i = 0; i < inventory.length; i++) {
-            ItemStack item = inventory[i];
+            CraftItemStack item = inventory[i];
             if (item != null && item.getTypeId() == materialId && item.getAmount() < item.getMaxStackSize()) {
                 return i;
             }
@@ -187,7 +187,7 @@ public class CraftInventory implements org.bukkit.inventory.Inventory {
                     } else {
                         // More than a single stack!
                         if (item.getAmount() > getMaxItemStack()) {
-                            setItem( firstFree, new ItemStack(item.getTypeId(), getMaxItemStack()));
+                            setItem( firstFree, new CraftItemStack(item.getTypeId(), getMaxItemStack()));
                             item.setAmount(item.getAmount() - getMaxItemStack());
                         } else {
                             // Just store it
@@ -197,7 +197,7 @@ public class CraftInventory implements org.bukkit.inventory.Inventory {
                     }
                 } else {
                     // So, apparently it might only partially fit, well lets do just that
-                    ItemStack partialItem = getItem(firstPartial);
+                    CraftItemStack partialItem = getItem(firstPartial);
 
                     int amount = item.getAmount();
                     int partialAmount = partialItem.getAmount();

src/main/java/org/bukkit/craftbukkit/inventory/CraftInventoryPlayer.java

@@ -62,9 +62,9 @@ public class CraftInventoryPlayer extends CraftInventory implements PlayerInvent
         setItem( getSize() + 3, boots );
     }
 
-    public ItemStack[] getArmorContents() {
+    public CraftItemStack[] getArmorContents() {
         net.minecraft.server.ItemStack[] mcItems = getInventory().getArmorContents();
-        ItemStack[] ret = new ItemStack[mcItems.length];
+        CraftItemStack[] ret = new CraftItemStack[mcItems.length];
 
         for (int i = 0; i < mcItems.length; i++ ) {
             ret[i] = new CraftItemStack(mcItems[i]);

src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java

@@ -7,11 +7,47 @@ public class CraftItemStack extends ItemStack {
     protected net.minecraft.server.ItemStack item;
 
     public CraftItemStack(net.minecraft.server.ItemStack item) {
-        super(item != null ? item.c : 0, item != null ? item.a : 0,
+        super(
-                (byte)(item != null ? item.d : 0));
+            item != null ? item.c : 0,
+            item != null ? item.a : 0,
+            (byte)(item != null ? item.d : 0)
+        );
         this.item = item;
     }
 
+    /* 'Overwritten' constructors from ItemStack, yay for Java sucking */
+    public CraftItemStack(final int type) {
+        this(type, 0);
+    }
+
+    public CraftItemStack(final Material type) {
+        this(type, 0);
+    }
+
+    public CraftItemStack(final int type, final int amount) {
+        this(type, amount, (byte) 0);
+    }
+
+    public CraftItemStack(final Material type, final int amount) {
+        this(type.getId(), amount);
+    }
+
+    public CraftItemStack(final int type, final int amount, final byte damage) {
+        this(type, amount, damage, null);
+    }
+
+    public CraftItemStack(final Material type, final int amount, final byte damage) {
+        this(type.getId(), amount, damage);
+    }
+
+    public CraftItemStack(final Material type, final int amount, final byte damage, final Byte data) {
+        this(type.getId(), amount, damage, data);
+    }
+
+    public CraftItemStack(int type, int amount, byte damage, Byte data) {
+        this(new net.minecraft.server.ItemStack(type, amount, data != null ? data : damage));
+    }
+
     /*
      * Unsure if we have to sync before each of these calls the values in 'item'
      * are all public.